Lamp.



PATiNTED APR. 21, 1968. n. PALMER & w. A. WILLITS.

LAMP.

APPLIOATIOH rmm SBPT.17, 19 a.

\grssr't INVENTU S,

- which is spaced from the lower UNITED sTAT is :P ENT OFFICE.=

EDWARD H. PALMER AND wILLiAM A. WILLirs, or DETROIT, MICHIGAN; SAID WILLITS" ASSIGNOR T'O sAm' PALMER. g 4

LAMP.

Specification of Letters Patent.

Patented April 21, 1908.

- Application filed September 17, 1906. Serial No. 334, 86 51.

to the accompanying drawings, which from-a part of this speclfication, a

This invention relates to lamps; it has for its object an improved construction of that class of lamps in which the fuel is converted from a liquid to a vaporous form in the lamp itself and the'vapor is fed downwardfrom its place of production to an underhanging mantle.

The objects of the invention'are carried out in a structure which comprises a feed ipe rovided with a suitable controlling va ve. anging below the feed pipe, in axial alinement with ,it, is a mixer,--the upper end'of feed pipe; the lower end of the feed pipe and the upper endof the mixer project into an ings into it throng air chamberthat is itself located within a chimney, which chimney surrounds the lower end of the feed pipe and themixer, and terminates at its lower end with -a suitable support for a globe.- The air chamber in .which the feed pi e. projects has free openthe wallsof the chimney, and there are free passages at each side' of it between its own walls and the walls of the chimney for the upward passage of the heated roducts of combustion.

In t e drawings Fi general construction of t e com" lete lamp. Fig; 2, is an "enlarged sectional e evation of the generating part of the lam l I sectlonal elevation of the air 0 amber. a

1, indicates a ban 'n'g pipe through which the fuel is fed to the angln mantle. 2. The end of the pi e 1 is surroun ed'by a chimney 3- which mu es or confines the heat rising from the flame at the mantle 2, holding it -close1y confined to the pipe, especially that part of the'pipe which is located between the controlling valve 4 and the cap 17, which part of the ipe may be utilized for a gener a'ting chamliier or retort. The fuel passes a controlling valve 4, emerges from the end of end of the.

e 1, shows the" the feed pipe and travels through a chamber 5 into the mixing chamber 6 thencethe fuel in the form of va or mixed with air travels downward throug a screen 7 and is burned withi'nand without the mantle 2.

The-mixing chamber 6 is tubular and is regulated by means of an internal tube 10 that can be adjusted vertically to vary the distance between the lower'end 11 of the feid pipe and the upper end 12 of thesliding tu e.

The end 11 of the feed pipe 1 hangs through thereof 13 of air chamber 5. The upper end 12 of the mixer 6 rises through the floor of the same air chamber 5. The air chamber itself is a narrow rectangular chamber extending a'crossthe chimney and provided with en trance ports '15 at each side, which open through the walls of the chimney into the outer air. At each side of thechamber 5 between its walls and the walls of the chimney is a free passage for the upward travel of products of combustion, and through the roof 13 of the chamber 5',

her into the chimney, of, air heatedwithinthe chamber 5 by the introduction ther'einto of a torch or by the combustion therein of a small portion of liquid fuel, which may be introduced into .the cup-like de ression 16' immediately surrounding the s ell of the mixing chamber and constructed in the floor of the chamber-5.

The diaphragm which forms the roof 13 of the chamber.5, is located below the controlling valve 4, and a large part of the feed tube 1, is located within thechimney 3, where it is subject to the upwardcurrents of heated air which arise either from the combustion at the mantle. 2 or from the combustion of a torch inserted within the chamber 5.

, By'the construction described, the initial heating to start the lamp and produce the st vapor is easily effected by introducing a torch into thechamber 5 below the outlet end .11 of the feed'tube 1, or by introducing a small amount of fuel into the cup 16 and ignitin it.

At t e time of initial lighting, the device employed to produce initlal -va orization is confined in such close contact wlth that part of the hangin pipe 1, which hangs in the air chamber .5, t at the initial heating is very rapid. After the li uid is burned out ofthe cup or the torch has con removed, the vapor are small openings 18,which permit theescape from the chamgenerated in the'retort of the tube 1 passes across the interval between the end 11 of the hanging pipe 1, and the mixer and'receives a sutlieient supply of air which enters through the-ports 15 and is carried down into and through the mixer with the vapor.

What we claim is:

1. In combination with a depending feed pipe and a regulating valve therefor, a mixing chamber below said feed pipe and spaced therefrom, a chimney surrounding the mixing chamber and the lower part of the feed pipe, an air chamber located within the chimney closed at its bottom and sides and provided with openings thereinto through the walls 'of said chimney adapted to admit of the pro duction of a starting flame therein, and with a erforated diaphragm forming the upper si e of said'chamber, and located below the upper end of said chimney whereby a portion of the feed pipe hanging in said chimney is in position to be exposed to hot air currents vided with discharge openings through the upper wall thereof into the said chimney, substantially as described.

In testimony whereof, We sign this specification in the presence of two witnesses.

EDl VARI) ll. PALMER. WILLIAM A. WILLITS. Witnesses:

WILLIAM M. SWAN, CHARLES F. BUR'roN. 

